(Original post by RDKGames)
Method 1 is right.Method two is wrong because you are working out the amount of gallons within 13 Litres, which is the other way around.

(Original post by B_9710)
For the second method you worked out how many gallons were in a litre, and then multiplied it by how many gallons the tank holds. What does that even mean? You get a unit that is .

I don't get it.
for example if you do 15/3, that means you're working out many 3's are in 15 right? which =

I did 1/4.5 so Gallon/L, so I thought that meant how many litres were in a gallon or something?! This is so confusing

(Original post by RDKGames)
Yes, but you're not multiplying it by 16 dollars, you're simply multiplying it by 16. It's easier to see if you lay it out like I did in the post above. Same procedure pretty much all the time.

£5=$7
£5/7 = $1
£5/7 * 16 = $1 * 16
£80/7 = $16

It's just simple equation balancing.

oh right I see what you mean, the layout makes it clearer, the exam i'm taking is on screen and you literally have max 40 seconds to answer a question so Ill have to lay it out in my head.. I can't believe simple GCSE stuff confused me so much lol thank you for the help!

(Original post by vybzkartel)
oh right I see what you mean, the layout makes it clearer, the exam i'm taking is on screen and you literally have max 40 seconds to answer a question so Ill have to lay it out in my head.. I can't believe simple GCSE stuff confused me so much lol thank you for the help!

If you're allowed a piece of paper it literally takes 10 seconds to jot it all down, but I'm not sure how effective you'd find this. No problem.

1. Literally just use the same idea as before just slightly differently. There's no multiplication because the measurements are going down, so to speak. Like from m into km you divide, and from hours into mins you multiply, but divide the numerator. I'll show you:

(Original post by RDKGames)
1. Literally just use the same idea as before just slightly differently. There's no multiplication because the measurements are going down, so to speak. Like from m into km you divide, and from hours into mins you multiply, but divide the numerator. I'll show you:

(Original post by metrize)Do you mean 21 metres per hour to kilometres per minute? Sorry I'm getting confused by the 'm's

If so if you travel 21 metres in an hour, you will travel 21/60 metres per minute, and then when you convert to km it would become 21/60000 kilometres per minute

yes i do

(Original post by RDKGames)
1. Literally just use the same idea as before just slightly differently. There's no multiplication because the measurements are going down, so to speak. Like from m into km you divide, and from hours into mins you multiply, but divide the numerator. I'll show you: